Method for short-term prediction of photovoltaic power generation power based on whole-sky imaging data

A technology for photovoltaic power generation and ultra-short-term prediction, applied in image data processing, data processing applications, image analysis, etc., can solve problems such as poor environmental protection, poor stability, and low energy conversion efficiency, and achieve good environmental protection and overcome poor stability , High energy conversion efficiency

Inactive Publication Date: 2014-06-25
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that there are at least defects such as poor stability, low energy conversion efficiency and poor environmental protection in the prior art

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  • Method for short-term prediction of photovoltaic power generation power based on whole-sky imaging data
  • Method for short-term prediction of photovoltaic power generation power based on whole-sky imaging data
  • Method for short-term prediction of photovoltaic power generation power based on whole-sky imaging data

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Embodiment Construction

[0046] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0047] According to an embodiment of the present invention, such as figure 1 , figure 2 and image 3 As shown, a method for ultra-short-term prediction of photovoltaic power generation based on all-sky imaging data is provided.

[0048] The ultra-short-term prediction method of photovoltaic power generation based on all-sky imaging data in this embodiment mainly includes the following steps:

[0049] Step 1: Binarize cloud image data.

[0050] According to the pre-set threshold, the cloud time series images captured by the all-sky imager are binarized by digital image processing technology.

[0051] Step 2: Cloud detection and labeling.

[0052] For the proces...

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Abstract

The invention discloses a method for short-term prediction of photovoltaic power generation power based on whole-sky imaging data. The method mainly comprises the steps that based on a preset threshold value, binarization processing is conducted on the whole-sky cloud image data; based on a binarization processing result, a cloud cluster is detected and marked; based on detecting and marking results, a mass center of the cloud cluster is extracted; based on an extraction result of the mass center of the cloud cluster, the movement speed and the movement direction of the cloud cluster are calculated through a plurality of adjacent images; based on calculation results of the movement speed and the movement direction of the cloud cluster, the time when a power station is shielded is analyzed and the change condition of the photovoltaic power generation power is predicated. According to the method for short-term prediction of the photovoltaic power generation power based on the whole-sky imaging data, the defects that stability is poor, the energy conversion efficiency is low, and the environmental protection property is poor in the prior art can be overcome and the method has the advantages that stability is good, the energy conversion efficiency is high, and the environmental protection property is good.

Description

technical field [0001] The present invention relates to the field of analysis of cloud layer motion characteristics for photovoltaic power generation, in particular to a method for ultra-short-term prediction of photovoltaic power generation power based on all-sky imaging data. Background technique [0002] According to relevant statistics, the National Development and Reform Commission has planned more than ten million-kilowatt photovoltaic power generation bases in Qinghai, Gansu and other provinces. At present, my country has entered a period of rapid development of photovoltaic power generation. In 2012, the photovoltaic power generation capacity of the national grid dispatching scope was 3.568 billion kwh, a year-on-year increase of 466%. [0003] Taking Gansu as an example, as of November 2013, Gansu's grid-connected photovoltaic power generation capacity has exceeded 2 million kilowatts, becoming the second largest emerging energy after wind power. As we all know, ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/20G06Q50/06
Inventor 汪宁渤路亮周强赵龙马彦宏马明王明松
Owner STATE GRID CORP OF CHINA
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